SOLUTION: cos((5π)/(18))cos((π)/(9))+sin((5π)/(18))sin((π)/(9))
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-> SOLUTION: cos((5π)/(18))cos((π)/(9))+sin((5π)/(18))sin((π)/(9))
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Question 476567
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cos((5π)/(18))cos((π)/(9))+sin((5π)/(18))sin((π)/(9))
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robertb(5830)
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